void chunjunwei_ShowPersonalInfo();
void liunannan_ShowPersonalInfo();
void mabo_ShowPersonalInfo();
void sunyuqi_ShowPersonalInfo();
void zhangjiayi_ShowPersonalInfo();
void zhangjiongjiong_ShowPersonalInfo();
void zhengyi_ShowPersonalInfo();

/* each student add his output function in this function.
*/
void ShowClassInfo_2021102()
{
    chunjunwei_ShowPersonalInfo();
    liunannan_ShowPersonalInfo();
    mabo_ShowPersonalInfo();
    sunyuqi_ShowPersonalInfo();
    zhangjiayi_ShowPersonalInfo();
    zhangjiongjiong_ShowPersonalInfo();
    zhengyi_ShowPersonalInfo();
}